Just an FYI for the OP, the basic poutine at Poutineville is pretty lame. It's a gimmicky place and their best poutines are the gimmicky ones. I went their expecting that they could do a good basic poutine and was very disappointed by the refrigerated cheese and industrial sauce.

I agree. I don't understand what people like about this place. I have not been there a lot obviously, but the 3 times I went nothing was really good. And every time they managed to forget something on my order (even when I was just adding 2 or 3 vegetables). I think gimmicky is the good word to describe them.

To Patiti Patata, Frite Alors and La Banquise, I would add Poutine Centrale.

Asking Montreal's favorite poutine is like asking fir new york's best burger. There is just so much choice! La banquise is a very solid poutine (this is the one I'd choose). A lot of people like patati patata. I like frite alors' pulled pork poutine. I'm not crazy about the one at la belle province but i do have a weakness for the poutine at lafleur (especially the one on saint-denis on the corner of carre saint-louis). Finally, i like paul patate's poutine because its near where i live and they serve it with housemade spruce beer (its a spruce soda, non alcoholic, traditional to quebec)